/*
 * Copyright (c) 2017, 2022, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
 * derivative works of, display, perform, and distribute the Software and make,
 * use, sell, offer for sale, import, export, have made, and have sold the
 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
package com.oracle.truffle.api.test.polyglot;

import java.util.function.Function;

import com.oracle.truffle.api.CallTarget;
import com.oracle.truffle.api.TruffleLanguage;
import com.oracle.truffle.api.nodes.RootNode;
import com.oracle.truffle.api.test.polyglot.SourceAPITestLanguage.LanguageContext;

@TruffleLanguage.Registration(id = SourceAPITestLanguage.ID, name = SourceAPITestLanguage.ID, version = "1.0")
public class SourceAPITestLanguage extends TruffleLanguage<LanguageContext> {

    static final String ID = "SourceAPITestLanguage";

    static Function<Env, Object> runinside;
    static LanguageContext langContext;

    static class LanguageContext {

        Env env;

    }

    public static LanguageContext getContext() {
        return CONTEXT_REF.get(null);
    }

    private static final ContextReference<LanguageContext> CONTEXT_REF = ContextReference.create(SourceAPITestLanguage.class);

    @Override
    protected CallTarget parse(ParsingRequest request) throws Exception {
        Object result = "null result";
        if (runinside != null) {
            try {
                result = runinside.apply(getContext().env);
            } finally {
                runinside = null;
            }
        }
        if (result == null) {
            result = "null result";
        }
        return RootNode.createConstantNode(result).getCallTarget();
    }

    @Override
    protected LanguageContext createContext(Env env) {
        langContext = new LanguageContext();
        langContext.env = env;
        return langContext;
    }

}
